Arsenal of the Warrior Princess is a short-ish module for 3rd to 5th level characters from Starlight Games, written by Alessandro Dellamotta. It's meant for B/X but should work with any OSR game. Perhaps the most unusual thing is that the author being European, uses the metric system. I'm not sure if European editions of B/X actually used that, but it's fairly easy to convert, 3m = 10', so 18m = 60, 24m = 90, and 36m = 120
The premise is that the dungeon complex was a weapons research facility of a long lost ancient empire, run by the daughter of the emperor. There was a magical accident and it killed everyone inside. Rather than the ancient empire using raise dead (which in B/X can be cast by a 7th level Cleric) or reincarnation or anything that you'd think an empire would have, they just buried her. But they did re-animate some of the dead in the complex to serve as guardians. Beyond that, they also buried the warrior princess with her magic sword. She really, really loved her magic sword.
